Oil burner



G. I. CARTER OIL BURNER Filed Nov. 1, 1944 mad.

Patented Dec. 2 3, 1947 OIL BURNER George Irving Carter, Longmeadow,iMass assignor to Harvey-Whipple,

Incorporated,

Springfield, Mass., a corporation of Massachusetts Application November1, 1944, Serial No. 561,396

2 Claims. (Cl. 15876) This invention relates to improvements in oilburner apparatus and is directed more particularly to apparatus adaptedfor use with boilers and heaters of varioustypes.

The principal object of the invention is to provide an oil burnerapparatus ofthe conversion type that is constructed and arranged wherebythe apparatus may be applied to various boilers, heaters and the like,but obviously may be a component part of a boiler, heater or the like.

According to special features of the invention, the apparatus isconstructed and arranged so as to be compact in form and efficient inoperation and its novel form and operation makes it possible to burn arelatively greater amount of fuel in a smaller combustion. chamber thanis the practice with prior art apparatus thereby enhancing efficiency inoperation.

Various novel objects and advantages of the invention and the novelfeatures of construction and arrangement will be observed from thefollowing description of the present preferred form of the inventionwith reference to the accompanying drawings, wherein:

Fig. 1 is a sectional plan view through the apparatus of the invention:

Fig. 2 is an elevational sectional view on the 'line 2-2 of Fig. 1; and

Fig. 3 is a perspective view of an air control member for the apparatusshown-in Figs. 1 and 2.

Referring now to the drawings more in detail, the invention will be morefully described but it will be understood that various changes andmodifications may be made in the form of the apparatus to adapt it forvarious uses and conditions without departing from the spirit and scopeof the invention.

An outer tube 2 is provided that is adapted for insertion in thecombustion chamber of a boiler or the like and it has an end providedwith a sloping annulus 4. Suitable means such as a flange on the tube 2.not shown, or other means.

W An end plate 8 is secured to a flange ID of the "outer tube 2 and aninner tube I2 is carried by a flange I I that is removably secured totheplate 8. A tube I6 for fuel extends forwardly within the inner tube l2and has a nozzle l8 of usual 2 delivered by the nozzle. The tube IE willbe connected to a suitable fuel supply and the electrodes 20 will beconnected to a source of energy.

The end of the tube l2 has an annular ring 22, to provide a centralopening forwardlyof the nozzle Ill. Both tubes have restricted outletswith the outer end walls of the tubes inclined towards the outlets.

A housing 24 at a side of the outer tube 2 is connected thereto in sucha way as to provide an air passageway 25 from the housing to said tube.An impeller 28 is located in the housing and is carried by a shaft 29 ofa motor 30 secured to the housing; As the impeller is rotated by themotor. air is delivered to the outer and inner tubes through thepassageway 25. The flow of air may be varied or controlled to obtain thedesired results.v

Various means may be employed for that purpose but for illustrativepurposes a tubular sleeve member 40 shown in Fig. 3 is oscillatable inthe outer tube 2. A clamp screw 42 threaded in the sleeve may extendthrough a circumferential slot form thereon. Electrodes extend withinthe tube l2 and have end portions 20 suitablyrelated to the nozzle so asto provide ignition for the fuel M in the tube 2 to effect rotarymovements of the sleeve 4!) and to secure said sleeve in adjustedpositions in the tube. By moving the sleeve in one direction or theother the area of an inlet represented by 46 may be varied thereby tovary and control the flow of air into the tube 2. An outwardly extendingscoop-like member 48 is carried by the inner tube I 2 adjacent an inlet5|] therein.

By means of the construction, air is delivered to the tube 2 around theinner tube l2 and to the inner tube through inlet 58. The air is causedto rotate or swirl as it passes from the rear or inner to the forward orouter ends of the tubes. This is desirable as the flow of air whilstmaintaining combustion is such as to cause air to be drawn outwardly andcombustion to take place outside of and forwardly of the tube 2 thusprotecting the nozzle and other parts and resulting in the mosteflicient operation.

Air delivered to the tube 2 may be varied as desired by adjusting thesleeve 40 or some other means as may be provided but such air as isdelivered passes into the tubes more or less tangentially so as to.accomplish the desired swirling or rotation of the air.

The invention may be embodied in other specific forms without departingfrom the essential characteristics thereof. Hence, the presentembodiments are therefore to be considered in all respects merely asbeing illustrative and not as being restrictive, the scope of theinvention being 3 indicated by the appended claims rather than by theforegoing description, and all modifications and variations that fallwithin the meaning and purview and range of equivalency of the appendedclaims are therefore intended to be embraced therein.

What it is desired to claim and secure by Let-- ters Patent of theUnited States is:

Oil burning apparatus comprising in combination, a housing and outertube construction having a passageway extending from the housing andleading into the outer end of the tube tangentially thereof, an airimpeller in said housing and means for rotating the same for directingair through said passageway into the outer tube, means closing the outerend of said outer tube, an inner tube within and disposed coaxially ofthe outer tube extending from the outer end thereof and having its innerend terminating inwardly of the inner end of said outer tube, meansclosing the outer end of said inner tube, the side walls of said innertube being spaced from adjacent walls of the outer tube and providing a,main annular air space therebetween, separate members on the inner endsof said tubes and being spaced apart to provide an air spacetherebetween in communication with said main air space and provided withcentral restricted outlets, fuel delivering and ignition means in saidinner tube adjacent the inner end thereof, said inner tube adjacent itsouter end being provided with an air inlet opening, a sleeve within theouter tube at its outer end provided with an opening in a side thereofand adapted for movement circumferentially of the outer tube to positionthe opening thereof relative to the said passageway and thereby controlthe flow of air into the said main annular air space.

2. Oil burning apparatus comprising in combination, a housing and outertube construction having a passageway extending from the housing andleading into the outer end of the tube tangentially thereof, an airimpeller in said housing and means for rotating the same for directingair through said passageway into the outer tube, means closing the outerend of said outer tube, an inner tube within and disposed coaxially ofthe outer tube extending from the outer end thereof and having its innerend terminating inwardly of the inner end of said outer tube, meansclosing the outer end of said inner tube, the side walls of said innertube being spaced from adjacent walls of the outer tube and providing amain annular air space therebetween, separate members on the inner endsof said tubes and being spaced apart to provide an air spacetherebetween in communication with said main air space and provided withcentral restricted outlets, fuel delivering and ignition means in saidinner tube adjacent the inner end thereof, said inner tube adjacent itsouter end being provided with an air inlet opening, a sleeve within theouter tube at'its outer end provided with an opening in a side thereofand adapted for movement circumferentially of the outer tube to positionthe opening thereof relative to the saidpassageway and thereby controlthe flow of air into the said main annular air space, the side walls ofthe inner tube diverging from a point intermediate the ends of said tubeto the inner end thereof thereby restricting said annular air space atthe inner ends of said tubes.

GEORGE IRVING CARTER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,640,731 Scott Aug. 30, 19272,066,806 Smith et a1 Jan. 5, 1937 2,090,567 Andler Aug. 17, 19372,120,387 Bargeboer June 14, 1938 2,206,070 Andler July 2, 19402,214,246 Finnigan Sept. 10, 1940 2,231,884 Carter Feb. 18, 19412,262,525 DeLancey Nov. 11, 1941 2,311,404 Macchi Feb. 16, 19431,909,294 Lubbock et al May 16, 1933 2,304,294 Wood Dec. 8, 19421,686,213 Koudritsky Oct. 2, 1928 2,269,719 Jackson Jan. 13, 1942FOREIGN PATENTS Number Country Date 408,030 Great Britain Apr. 5, 1934

